Flutter macOS Embedder
FlutterPluginRegistrarMacOS.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef FLUTTER_SHELL_PLATFORM_DARWIN_MACOS_FRAMEWORK_HEADERS_FLUTTERPLUGINREGISTRARMACOS_H_
6 #define FLUTTER_SHELL_PLATFORM_DARWIN_MACOS_FRAMEWORK_HEADERS_FLUTTERPLUGINREGISTRARMACOS_H_
7 
8 #import <Cocoa/Cocoa.h>
9 
11 #import "FlutterChannels.h"
12 #import "FlutterMacros.h"
13 #import "FlutterPlatformViews.h"
14 #import "FlutterPluginMacOS.h"
15 #import "FlutterTexture.h"
16 
17 // TODO(stuartmorgan): Merge this file and FlutterPluginMacOS.h with the iOS FlutterPlugin.h,
18 // sharing all but the platform-specific methods.
19 
20 /**
21  * The protocol for an object managing registration for a plugin. It provides access to application
22  * context, as allowing registering for callbacks for handling various conditions.
23  *
24  * Currently the macOS PluginRegistrar has very limited functionality, but is expected to expand
25  * over time to more closely match the functionality of FlutterPluginRegistrar.
26  */
28 @protocol FlutterPluginRegistrar <NSObject>
29 
30 /**
31  * The binary messenger used for creating channels to communicate with the Flutter engine.
32  */
33 @property(nonnull, readonly) id<FlutterBinaryMessenger> messenger;
34 
35 /**
36  * Returns a `FlutterTextureRegistry` for registering textures
37  * provided by the plugin.
38  */
39 @property(nonnull, readonly) id<FlutterTextureRegistry> textures;
40 
41 /**
42  * The view displaying Flutter content.
43  *
44  * This property is provided for backwards compatibility for apps
45  * that assume a single view. This will eventually be replaced by
46  * a multi-view API variant.
47  *
48  * This method may return |nil|, for instance in a headless environment.
49  */
50 @property(nullable, readonly) NSView* view;
51 
52 /**
53  * Registers |delegate| to receive handleMethodCall:result: callbacks for the given |channel|.
54  */
55 - (void)addMethodCallDelegate:(nonnull id<FlutterPlugin>)delegate
56  channel:(nonnull FlutterMethodChannel*)channel;
57 
58 /**
59  * Registers the plugin as a receiver of `NSApplicationDelegate` calls.
60  *
61  * @param delegate The receiving object, such as the plugin's main class.
62  */
63 - (void)addApplicationDelegate:(nonnull NSObject<FlutterAppLifecycleDelegate>*)delegate;
64 
65 /**
66  * Registers a `FlutterPlatformViewFactory` for creation of platform views.
67  *
68  * Plugins expose `NSView` for embedding in Flutter apps by registering a view factory.
69  *
70  * @param factory The view factory that will be registered.
71  * @param factoryId A unique identifier for the factory, the Dart code of the Flutter app can use
72  * this identifier to request creation of a `NSView` by the registered factory.
73  */
74 - (void)registerViewFactory:(nonnull NSObject<FlutterPlatformViewFactory>*)factory
75  withId:(nonnull NSString*)factoryId;
76 
77 /**
78  * Publishes a value for external use of the plugin.
79  *
80  * Plugins may publish a single value, such as an instance of the
81  * plugin's main class, for situations where external control or
82  * interaction is needed.
83  *
84  * The published value will be available from the `FlutterPluginRegistry`.
85  * Repeated calls overwrite any previous publication.
86  *
87  * @param value The value to be published.
88  */
89 - (void)publish:(nonnull NSObject*)value;
90 
91 /**
92  * Returns the file name for the given asset.
93  * The returned file name can be used to access the asset in the application's main bundle.
94  *
95  * @param asset The name of the asset. The name can be hierarchical.
96  * @return the file name to be used for lookup in the main bundle.
97  */
98 - (nonnull NSString*)lookupKeyForAsset:(nonnull NSString*)asset;
99 
100 /**
101  * Returns the file name for the given asset which originates from the specified package.
102  * The returned file name can be used to access the asset in the application's main bundle.
103  *
104  *
105  * @param asset The name of the asset. The name can be hierarchical.
106  * @param package The name of the package from which the asset originates.
107  * @return the file name to be used for lookup in the main bundle.
108  */
109 - (nonnull NSString*)lookupKeyForAsset:(nonnull NSString*)asset
110  fromPackage:(nonnull NSString*)package;
111 
112 @end
113 
114 /**
115  * A registry of Flutter macOS plugins.
116  *
117  * Plugins are identified by unique string keys, typically the name of the
118  * plugin's main class.
119  *
120  * Plugins typically need contextual information and the ability to register
121  * callbacks for various application events. To keep the API of the registry
122  * focused, these facilities are not provided directly by the registry, but by
123  * a `FlutterPluginRegistrar`, created by the registry in exchange for the unique
124  * key of the plugin.
125  *
126  * There is no implied connection between the registry and the registrar.
127  * Specifically, callbacks registered by the plugin via the registrar may be
128  * relayed directly to the underlying iOS application objects.
129  */
130 @protocol FlutterPluginRegistry <NSObject>
131 
132 /**
133  * Returns a registrar for registering a plugin.
134  *
135  * @param pluginKey The unique key identifying the plugin.
136  */
137 - (nonnull id<FlutterPluginRegistrar>)registrarForPlugin:(nonnull NSString*)pluginKey;
138 
139 /**
140  * Returns a value published by the specified plugin.
141  *
142  * @param pluginKey The unique key identifying the plugin.
143  * @return An object published by the plugin, if any. Will be `NSNull` if
144  * nothing has been published. Will be `nil` if the plugin has not been
145  * registered.
146  */
147 - (nullable NSObject*)valuePublishedByPlugin:(nonnull NSString*)pluginKey;
148 
149 @end
150 
151 #endif // FLUTTER_SHELL_PLATFORM_DARWIN_MACOS_FRAMEWORK_HEADERS_FLUTTERPLUGINREGISTRARMACOS_H_
FlutterPlatformViews.h
FlutterPlugin-p
Definition: FlutterPluginMacOS.h:29
FlutterMethodChannel
Definition: FlutterChannels.h:220
FlutterPluginMacOS.h
FlutterPluginRegistrar-p::textures
id< FlutterTextureRegistry > textures
Definition: FlutterPluginRegistrarMacOS.h:39
FlutterTexture.h
FlutterChannels.h
FlutterMacros.h
FlutterPluginRegistrar-p
Definition: FlutterPluginRegistrarMacOS.h:28
FlutterPluginRegistrar-p::messenger
id< FlutterBinaryMessenger > messenger
Definition: FlutterPluginRegistrarMacOS.h:33
FlutterAppLifecycleDelegate-p
Definition: FlutterAppLifecycleDelegate.h:21
FlutterBinaryMessenger.h
FlutterPlatformViewFactory-p
Definition: FlutterPlatformViews.h:13
FLUTTER_DARWIN_EXPORT
#define FLUTTER_DARWIN_EXPORT
Definition: FlutterMacros.h:14
FlutterPluginRegistrar-p::view
NSView * view
Definition: FlutterPluginRegistrarMacOS.h:50